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FILE - This 1986 file picture shows part of the Milky Way galaxy as seen from Australia. Scientists have estimated the first cosmic census of planets in our galaxy and the numbers are astronomical: at least 50 billion planets in the Milky Way. At least 500 million of those planets are in the not-too-hot, not-too-cold zone where life could exist, scientists announced Saturday, Feb. 19, 2011. The numbers were extrapolated from the early results of NASA's planet-hunting Kepler telescope. (AP Photo)

Cosmic census finds crowd of planets in our galaxy

By SETH BORENSTEIN - Associated Press

This artist rendering provided by NASA shows Kepler-11, a sun-like star around which six planets orbit. A planet-hunting telescope is finding whole new worlds of possibilities in the search for alien life, including more than 50 potential planets that initially appear to be in habitable zones. (Associated Press/NASA)

5 Earth-sized planets spied in ‘habitable zone’

By Rebecca Carroll - The Washington Times